I am mostly Safari because of the syncing of bookmarks. I have Opera and Atomic on my iPhone for in case I am in an Edge area and I want just the "info" and not all the pics. Loads quicker In those low signal areas.

Nah it doesn't have tabs it has separate windows. With tabs you can see them all in a single window and switch with a single tap.

Atomic over Safari because of the ability to auto fill any web page you want to fill in. That's very big for me.

This is a big one for me as well, which is another reason why I jailbreak. FullSafari from Cydia allows me to have full screen in Safai along with a few extra toggles that pop up when I tap and hold a web page.